RFR (S): 8005173: assert(false) failed: DEBUG MESSAGE: exception oop must be empty (macroAssembler_x86.cpp:625)

[Christian Thalinger]

https://bugs.openjdk.java.net/browse/JDK-8005173
http://cr.openjdk.java.net/~twisti/8005173/webrev.00/

8005173: assert(false) failed: DEBUG MESSAGE: exception oop must be empty (macroAssembler_x86.cpp:625)
Reviewed-by:

The problem is that we don't clean the current exception oop and pc in OptoRuntime::handle_exception_C_helper before calling out to SharedRuntime::compute_compiled_exc_handler which call load classes and thus execute Java code. 

The corresponding code for C1 in exception_handler_for_pc_helper does that. 

Since the assert we are hitting in Runtime1::generate_handle_exception only exists on x86 we should also add it on the other platforms (or SPARC at least).